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anonymous

6 years ago

it is a special case of strokes theorem|dw:1319455579298:dw|
check out the drawing
you have n numbers of infinitesimal little boxes.
the opposite arrow heads will cancel each other till you reach the boundiries of the surface
this means you try to understand the behaviour of a infinitesimal little box to see how the whole big box act.|dw:1319455929822:dw|